Event calendar file
3-11 July 2007
Merida, Mexico
Mexico/General timezone
- icrc2007@icrc2007.unam.mx
Support
SH 3.1
Place
Location: Merida, Mexico
Room: Yucatan I (Fiesta Americana)
Date:
9 Jul 08:30 - 10:00
Conveners
-
- Dr. Moraal, Harm (North-West University)
Timetable | Contribution List
Displaying 7
contributions
out of
7
At low energies, cosmic-ray nuclei experience the adiabatic limit where their
intensity becomes proportional to their kinetic energy per nucleon, independent
of the diffusion tensor and interstellar spectrum. Low-energy electrons, on the
other hand, do react to changes in the diffusion tensor and are therefore ideal
probes of its spatial- and rigidity dependence. To construct a diffusion t
... More
Presented by Prof. Renier BURGER
on
9/7/2007
at
13:42
An improved nonlinear theory for the perpendicular transport of charged particles is
presented. This approach is based on an improved nonlinear treatment of field-line
random walk in combination with a generalized compound diffusion model. The
generalized compound diffusion model employed is much more systematic and reliable,
in comparison to previous theories such as the nonlinear guiding cen
... More
Presented by Dr. Andreas SHALCHI
on
9/7/2007
at
13:30
We developed 2D time dependent heliospheric model where particles trajectory are
reconstructed back in time. The model is time dependent due to drifts in the
heliosphere. We followed particles also after escaping the heliosphere in the
interstellar space to found the fraction of them that reenter back again into the
heliosphere. We show how this effect can change the modulation of particles i
... More
Presented by Dr. Pavol BOBIK
on
9/7/2007
at
13:54
The spectra of low-energy cosmic-ray protons and antiprotons have been measured by
BESS in nine high-latitude balloon flights between 1993 and 2004. These measurements
span a range of solar activity from the previous solar minimum through solar maximum
and the onset of the present solar minimum, as well as a solar magnetic field
reversal from positive to negative in 2000. Because protons and a
... More
Presented by Dr. John W. MITCHELL
on
9/7/2007
at
14:30
Nearly thirty years ago it was shown that large scale drift plays a significant
role in cosmic ray modulation in the heliosphere. It was found, however, that
the classical values for the drift velocity used in the modulation models lead to
too much drift, and required some reduction. The typical argument for this
reduction of the drift velocity is that when cosmic rays propagate in a tur
... More
Presented by Prof. John BIEBER
on
9/7/2007
at
14:06
The Fisk-model for the heliospheric magnetic field (HMF) was developed in an
attempt to connect the structure of the magnetic field at large heliocentric
distances to processes in and above the photosphere. A Fisk-Parker hybrid
model that is valid for the whole heliosphere (Burger and Hitge 2004, ApJL,
617) and the whole solar cycle (Kruger 2006, MSc dissertation, NWU University)
was dev
... More
Presented by Prof. Renier BURGER
on
9/7/2007
at
14:42
Using the spacecraft and the stratospheric balloon cosmic ray data for 1973-2007 we
construct the radial profiles of the medium energy GCR intensity for the successive
solar activity minima (A>0 and A<0) and attempt to describe them in the simple
modulation model taking into account the potential difference between the heliosphere
and the infinity. Besides, using the above radial profiles we n
... More
Presented by Dr. Mikhail KRAINEV
on
9/7/2007
at
14:18
